Merino wool top cover regulates temperature, wicks moisture away, and stays fresh longer * Deep heel cup cradles your heel (the calcaneal pad) to help optimize your body"s natural shock absorption * Encapsulating Stablizer System [ESS] provides biomechanical support to help improve foot function * Contoured shape, based on the proven principles of podiatric medicine, adapts the flat, 2-dimensional midsole to the 3-dimensional foot * Supports any foot type in high-volume footwear with removable insoles